Women's Jambu Flurry Waterproof Insulated Winter Boots Cozy warmth meets next-level sub-zero durability. This winter boot goes above and beyond the call of duty, with a premium waterproof construction that’s cold crack tested and a protective shell that wraps around to protect you from the elements. Engineered with the highest-grade insulation system and a built-in slip-resistant plug, the Flurry is built to keep you warm in sub-zero temperatures and offer maximum grip, no matter the terrain.